Specifications

AT Command Set Reference
Ver. 1.00
GSM1308AT001 Page 59 Ver. 1.00 – 10/29/2008
2.1.3.12. AT+CHLD Call Hold and Multiparty
(continued)
Parameter Values
<n> 0 Terminate all held calls; or set UDUB
(User Determined User Busy) for a
waiting call, i.e. reject the waiting
call.
1 Terminate all active calls (if any) and
accept the other call (waiting call or
held call)
1X Terminate the active call X (X= 1-7)
2 Place all active calls on hold (if any)
and accept the other call
(waiting call or held call) as the
active call
2X Place all active calls except call X
(X= 1-7) on hold
3 Add the held call to the active calls
4 Connects the two calls and
disconnects the subscriber from both
calls (ECT).
Reference GSM Ref. 07.07 Chapter 7.12
Standard Scope Optional
Enfora Implementation Scope Full
Notes Call Hold, MultiParty and Explicit Call
Transfer are only applicable to
teleservice 11(Speech Telephony).